package com.longge;

/**
 * @program: my-code
 * @description:
 * @author: longge
 * @create: 2021-05-08 02:32
 */
public class MaxDepth {

    public int maxDepth(TreeNode root) {
        if (root == null) return 0;
        int left = maxDepth(root.left);
        int right = maxDepth(root.right);
        return 1 + (left > right ? left : right);

    }
}
